Trait HasCount 

pub trait HasCount<Idx> {
    type Value;

    // Required method
    fn count(&self) -> &Self::Value;
}

The identity a selected count(*) is filed under in a row.

Required Associated Types

type Value

Required Methods

fn count(&self) -> &Self::Value

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<L, Idx> HasCount<Idx> for Row<L>

where L: Field<Count, Idx>,

type Value = <L as Field<Count, Idx>>::Value